From 3b0f1c6307e542988a94ad5ac756937e97d29a46 Mon Sep 17 00:00:00 2001
From: Joe Karayusuf <jkarayusuf@gmail.com>
Date: Sun, 16 Dec 2012 00:40:06 -0500
Subject: [PATCH] Choose open edge as a last resort

---
 lib/board.rb        |  8 ++++++++
 lib/player.rb       |  5 +++++
 spec/player_spec.rb | 10 ++++++++++
 3 files changed, 23 insertions(+)

diff --git a/lib/board.rb b/lib/board.rb
index 41a99d8..d165a2c 100644
--- a/lib/board.rb
+++ b/lib/board.rb
@@ -19,6 +19,14 @@ def open_spaces
       @spaces.select { |space| space.open? }
     end
 
+    def open_edge_spaces
+      open_spaces.select { |space| space.edge? }
+    end
+
+    def edge_spaces
+      @spaces.select { |space| space.edge? }
+    end
+
     def open_corner_spaces
       open_spaces.select { |space| space.corner? }
     end
diff --git a/lib/player.rb b/lib/player.rb
index 51beed9..6477df9 100644
--- a/lib/player.rb
+++ b/lib/player.rb
@@ -21,6 +21,7 @@ def move
       space ||= center
       space ||= opposite_corner
       space ||= corner
+      space ||= edge
       space
     end
 
@@ -55,5 +56,9 @@ def opposite_corner
     def corner
       @board.open_corner_spaces.first
     end
+
+    def edge
+      @board.open_edge_spaces.first
+    end
   end
 end
diff --git a/spec/player_spec.rb b/spec/player_spec.rb
index 56ced84..99d25cb 100644
--- a/spec/player_spec.rb
+++ b/spec/player_spec.rb
@@ -310,5 +310,15 @@ module TicTacToe
         player.move.row_and_column.should eql "0 0"
       end
     end
+
+    context "edge" do
+      it "chooses the first available edge" do
+        player = Player.new("X", [ ["X", "O", "X"],
+                                   ["O", "X", "_"],
+                                   ["O", "X", "O"] ])
+
+        player.move.row_and_column.should eql "1 2"
+      end
+    end
   end
 end